attend to专心,注意,照顾 Attend to my words. 注意我的话. attend on,伺候 it is incumbent on me to attend. 给予照顾是我义不容辞的。 attend upon服侍 attend upon as a squire; serve as a squire. 当作侍从服侍；像侍从一样侍侯。
第2个回答 2013-09-05
attend on; attend upon 这个可以互换，是没异议的，因为on 和 upon 本来就可以互换的 而这个on / upon 后边是接Sb的 attend to 还记得有个 pay attend to 的短语吗，这个一般是接sth多一点